An international group of researchers including Russian scientists from the Moscow State University has been studying the behaviour of the recently-discovered iron oxide Fe4O5. They discovered that when Fe4O5 iron oxide is cooled to temperatures below 150K, it goes through an unusual phase transition related to a formation of charge-density waves—which lead to a "four-dimensional" crystal structure. This study would contribute to the understanding of the interconnection between magnetic and crystal structures. http://phys.org/news/2016-04-mysterious-four-dimensional-iron-oxide.html Paper: http://www.nature.com/nchem/journal/vaop/ncurrent/full/nchem.2478.html